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From: Eric Dumazet <eric.dumazet@gmail.com>
To: "David S . Miller" <davem@davemloft.net>,
	Jakub Kicinski <kuba@kernel.org>
Cc: netdev <netdev@vger.kernel.org>,
	Eric Dumazet <edumazet@google.com>,
	Eric Dumazet <eric.dumazet@gmail.com>,
	Alexander Aring <alex.aring@gmail.com>,
	Stefan Schmidt <stefan@datenfreihafen.org>,
	syzbot <syzkaller@googlegroups.com>
Subject: [PATCH net] ieee802154: hwsim: avoid possible crash in hwsim_del_edge_nl()
Date: Mon, 21 Jun 2021 11:02:44 -0700	[thread overview]
Message-ID: <20210621180244.882076-1-eric.dumazet@gmail.com> (raw)

From: Eric Dumazet <edumazet@google.com>

Both MAC802154_HWSIM_ATTR_RADIO_ID and MAC802154_HWSIM_ATTR_RADIO_EDGE
must be present to avoid a crash.

Fixes: f25da51fdc38 ("ieee802154: hwsim: add replacement for fakelb")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Alexander Aring <alex.aring@gmail.com>
Cc: Stefan Schmidt <stefan@datenfreihafen.org>
Reported-by: syzbot <syzkaller@googlegroups.com>
---
 drivers/net/ieee802154/mac802154_hwsim.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/ieee802154/mac802154_hwsim.c b/drivers/net/ieee802154/mac802154_hwsim.c
index da9135231c079d4ecc0783aa62f2fec07c3f86e6..d5e8b5a067fc6c044dac5dbe3544f4a768f78a76 100644
--- a/drivers/net/ieee802154/mac802154_hwsim.c
+++ b/drivers/net/ieee802154/mac802154_hwsim.c
@@ -480,7 +480,7 @@ static int hwsim_del_edge_nl(struct sk_buff *msg, struct genl_info *info)
 	struct hwsim_edge *e;
 	u32 v0, v1;
 
-	if (!info->attrs[MAC802154_HWSIM_ATTR_RADIO_ID] &&
+	if (!info->attrs[MAC802154_HWSIM_ATTR_RADIO_ID] ||
 	    !info->attrs[MAC802154_HWSIM_ATTR_RADIO_EDGE])
 		return -EINVAL;
 
-- 
2.32.0.288.g62a8d224e6-goog


             reply	other threads:[~2021-06-21 18:18 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-06-21 18:02 Eric Dumazet [this message]
2021-06-22 18:30 ` [PATCH net] ieee802154: hwsim: avoid possible crash in hwsim_del_edge_nl() Alexander Aring
2021-06-22 19:39   ` Stefan Schmidt

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